Head support



FIG. 1 is a perspective view of the head support showing my new design the broken lines are for environmental purposes only and form no part of the claimed design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a left side elevational view thereof; and,

FIG. 8 is a top plan view thereof in a spread position. 

The ornamental design for a head support, as shown and described. 